Russell Lamour Jr. of Portland scored an eight-round unanimous decision over Jaime Barboza of Costa Rica in the main event Saturday night at the Portland Expo.

The card was the 103rd put on by the Portland Boxing Club.

Larry Holmes, the former heavyweight champion, attended and was given a key to the city by Mayor Ethan Strimling.

The Portland Boxing Club had five fighters on the card, and all of them won.

Lamour (15-2) defeated Barboza, who was billed as the reigning Central American middleweight champion.

They traded devastating shots early, with Lamour knocking down Barboza late in the first round with an uppercut.

Barboza came back in the second round to knock down Lamour with a left hook.

In other fights:

n Jorge Abiague, also of the Portland Boxing Club, won a six-round unanimous decision over Basilio Nieves in a super bantamweight fight and improved to 7-2 as a professional.

n The first Portland Boxing Club pro to climb into the ring was Casey Kramlich (6-0-1), who defeated Larry Smith of Dallas by decision in a four-round junior middleweight bout.

n Gabriel “Tito” Morales (3-0) opened the card with a unanimous decision over Christian Castro in a three-round amateur featherweight bout.

n The second amateur fight pitted Josniel Castro of the Portland Boxing Club against John DeAngelis, with Castro (13-9) winning a unanimous decision in a welterweight contest.

n In the first pro fight, junior welterweight Matt Doherty of Salem, Massachusetts, stopped Josue Rivera of Philadelphia by technical knockout 46 seconds into the third round.

n Rocco Salimbene of Philadelphia scored a four-round unanimous decision over Ian James of New York in the junior welterweight division.

n Mike Materkowski of Amesbury, Massachusetts, beat Ricky Ford of Claremont, New Hampshire, in a four-round split decision.